Superheater.



H. B. oATLBY. SUPERHEATER. APPLIGATION FILD MAY 27,1908.

902,440. Patented oct. 27, 1908.

` e SHEETS-SHEET 1.

WITNESSES H. B. OATLEY.

SUPERHEATER.

APPLIOATION FILED MAY27,1908.

902,440. A Patented ont. 27,1908.

e SHEETS-SHEET 2.

-flfl v wrNEssEs H. B. OATLEY.

SUPBRHEATER.

APPLICATION FILED MAY 27,1908.

Patented 0G13. 27, 1908.

e SHEETS-SHEET a.

H. B. UATLEY.

SUPERHEATER.

APPLIoATIoN FILED MAY 27, 190s.

Patented oct. 27', 1908.l

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H. B. OATLBY. SUPEBHBATBR.

APPLICATION IILBD MAY 27, 1908.

902,440. d Patented 001;. 27; 1908.

6 SHEETS-SHEET 5.

FIGS. v

- H. B; OATLBY.

SUPERHEATER.

APPLIOATION FILED. nu 27,1998.

Pallented Oct. 27, 1908.

6 SHEETS-SHEET 6.

WITNESSES m YORK, ASSIGNOR TO AMERICAN LOCOMOTIVE HENRY BfoA'rLEY, or SGHENECTADY, Nrw Y.,

COMPANY, OF NEW YORK, N.

A CORPORATION OF NEW YORK.

SUPERHE ATER.

Specification of Letters Patent.

Patented Oct. 27, 1908 Application filed May 27, 190B. Serial No. l1:35186.

l To all whomit may concern:

Be it known that I, HENRY B. OATLEY, of Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Steam- Boiler Superheaters, of which improvement the following is a-specification.

My present invention relates to superheaters of the so-called smoke box type,

that is to say of the general class or type 1n which the superheating appliances are located in the smoke box of a fire tubesteam boiler, and its object is to provide a superheater of such type which shall be readily apexpansion and contraction.

The improvement claimed is hereinafter ,fully set forth.

In the accompanying drawings: Figure l lis a vertical longitudinal central section through the forward portion of a locomotive boiler, illustrating an application of my invention; Fig. 2, a horizontal section through the same, with theT head also shown in section; Fig. 3, a view, partly infront elevation,

with the smoke box front removed, and partly in vertical transverse section, on the line a (L of Fig. 2; l Fig. 4, a vertical longitudinal section illustrating an application of my invention in a compound locomotive, Fig. 5, a horizontal section of the construction shown in Fig. 4, and; Fig 6, a vertical transverse section, on the line b b of Fig. 4.

Referring first to Figs. 1 to 3 inclusive, my invention is herein set forth as applied in a locomotive boiler, 4, which is substantially of the ordinary construction, and is provided, at its forward end, with a smoke box, 4, of the ordinary form and dimensions. of fire tubes, 4, extend from the firebox at the rear end of the boiler', which is not shown,

, to the front fine sheet, 4d, and the products of combustion pass through said tubes to the A. plurality smoke box, 4, from which they are discharged, through the stack, in the usual manner. Steam is supplied from the boiler to the cylinders of the locomotive, through a main steam pipe or dry pipe, 61, passing through the front flue sheet, and connected, in front thereof, to aT head, 62, from which it is conducted through superheater pipes, 6), which, with their accessories, will be presently described, and, after being superheated in said pipes, passes to the cylinders through delivery steam pipes, 63,1ocated onoppositc sides of the smoke box, in the lower portion thereof.

A casing or header, 70, is located on each side of the smoke box, adjoining, as closely as practicable, the front ring, 4h, thereof, each of said headers comprising a saturated steam compartment, 7 0*?, and a super-heated steam compartment, 70f, which are of sub stantially rectangular transverse section, and are, preferably, as shown, formed integral and connected by an intermediate plate or web. The headers are curved vertically, so

as to conform, as nearly as may be, with the curvature of the smoke box wall, and to stand as closely thereto as practicable and leave the maximum open space between them which is` available under the diameter of the smoke box. They are supported on' rods, 70, connected to the bottom of the smoke box, andareconnected at the to i by a` transverse rod, 70'", passing through ugs on the fronts of the headers and provided with adjusting nuts engaging screw threads on its ends.

By reference to Figs. 2 and 3, it will be seen that the walls of the saturated and superheated steam compartments of the headers are substantially completely separated,

'and therefore ,that there will be no loss of heat by its transfer through said walls from the su erheated to the saturated steam.

' Whl e, as a matter of convenience. in manufacture and installation, the saturated and superheated steam compartments of each of the headers are preferably cast integral, as shown, it will be obvious that they may, if deemed advisable by made in separate castings, without departure from the spirit and operative principle of vmy invention.

the constructor, be

y so.

superheated steam compartment, 701'.

steam supply pipes, 62D, are formed upon or secured to the T lieadf, each oi said. pipes being connected, at its forward end, to a nozzle or short pipe, 70a, extending rearwardly from the upper portion of the saturated steam compartment, 70e, of one of the headers, and nozzles, 70", on the lower portions of the superheated steam compartments, 701', of the headers are connected to branch or 'delivery steam pipes, 63, leading to the engine cylinders.

The saturated steam compartment, 70 e, of each of the headers, is connected with the f superheated steam compartment, 70f, thereof, by a plurality oi' loops orbends of superheater pipes', 69, each of which extends rearwardly from one .of the saturated steam com'- partments, as nearly to the front iiue sheet, 4d, as may be practicable, and is bent alternately forwardly and rearwardly into a pluralityo'f substantially horizontal convolu'-I tions, as clearly shown in Fig. 2,'and connected, at itstiforward end, to the adjacent addition to the advantage of presenting a very large area of superheating surface, located in such position as to be directly exposed to'the heat ol the products of' combustion passing through the smoke box, from the boiler tubes to the staclr,.tl1e convoluted forni oi the superheater pipes enables the action oi expansion and contraction in the pipes to be fully. compensated, and liability to leakage the headers to be correspondingly reduced. Openings, 'which are closed :by removable plugs, 700, are formed in the fronts oi the eaders, said openings providing for the insertion, examination, and repair of the superheater pipes. In the event of leakage at the joints, the plugs can be detached and the I superheater pipes expanded as required, and

itWillibe seen that they are much more readily and conveniently accessible than in superheaters in which the l headers are located adjacenttothe front il-ue sheet. In order to prevent loss of heat of the smoke box gases,

and enable its action to ively as and hea ers, the smoke box front, 4h, is pret erably made double, with an incloseddagging of suitable non-conductin material.'

The smoke box is, Where soli fuel is used, iitted with a spark arresting appliance oi any suitable and preferred construction, Which is, in this instance, shown as comprising an ordinary diaphra in or delecting plate, 4 0, extending from tlxe iront flue sheet, ed, to the iront of the exhaust pipe, 64, below the ynozzle oi the latter, vand lateral and longitudinal sheets of netting orl perforated plate, 4f. .ln order to direct the 'escapin gases towards the superheater pipes, as We.

at their' connections Withv be exerted as eilectossible upon the superheater pipes eee/isc l except through the openings of the nettingI or perforated plate,v plate, fig, extends. ftorwardly from the deiiecting plate, 4," to the netting or perforated plate, on th'efinner sets of superheaterlpipes, said plates causing the gases to pass forwardly and upwardly to the stack around the superheater pipes.-

ln A.operation, saturated steam from the head, 62, and branch steam supply pipes, 62D, into the saturated steam compartments, e, oi the headers, and thence, through 'the convolutions of the sets of superheatcr pipes, 69, intnthe superlieated '701, being, in its traverse through .the headers and superheater pipes, lthoroughly super heated by the hot products of combustion which pass through the smoke box. The superheated steam passes from the superheated steam compartments into the communicating branch or delivery steam pipes, 63, and thence to the `engine, cylinders. for L i'tilization therein. A l, Figs. 4, 5, and 6 illustrate theapplication ci a super-heater embodying all the essential features of that above described, for the Vpurpose of superheatihg vthe high pressure' exhuast steam of a compound locomotive, during its traverse from the high pressueto' the low pressure 4cylinder thereof, steam being supplied to the high pressure cylinder fron* the dry pipe, 61, andT-head,`=,2, by a vbranch steam supply pipe,62b, in the ordinary manner. The headers, 70, are, in?, this case, simi-- larly located to those irst described, and are of the same general form, each being divided into a saturated steam compartment, 708, and a superheated steam compartment, 70f, the walls of which are separated by intervening'spaces. Thesaturated steam compartments communicate, at their lower ends, by a supply nozzle, 70a, With a section, 62h, of the exhaust pipe leading from the high pres- .sure cylinderya'nd communicatle, vone with the other, by an upper transverse passage, 70h. The superheated steam cornpartments 4 o1nmunicate, one with the other,at their lower ends, through a transverse passage, 70, below which they communicate, in common, with the steam passages leading to the lovr pressure cylii'rder, through a4 delivery nozzle, 70h. The saturatedland superheated steam compartments are, similarly to those first-described, connected by a pluralityof. loops or bends of superheater pipes, 69, `,the convolutions of which provide passa es having a large area of superheating. sur acel' `"in terposed in the lire of traverse of the high pressure exhaust steam from the. high pressure to the loW pressure cylinder, and 'iii which it is superheated as before described. lt'will be seen that the application of my invention does not involve any change of as to prevent the access of sparks to the stack form or dimensions in smoke boxes of the a longitudinal. partition n side of each of the n,

boiler passes through the dry pipe, 6 1', T l

steam compartments o losr iis

present standard type, nor any substantial modification of the accessories thereof now in general use. As large an area of superlieating surface as is obtainable under these conditmns is afforded, and the joints are located asfar as possible from the front flue sheet and in position Where t-hey are readily accessible when required. The projection of the headers towards the vertical central plane of the smokeI box is, by reason of their vertically curbed form, not substantially greater than that of the present branch steam pipes, and the objection of interference with access to the boiler' tubes, which has obtained, vto a greater' or less degree, in prior constructions, is therefore correspondingly minimized.

f claim as'my invention and desire to secure by Letters Patent:

1. 'lhc combination, with a steam boiler, of a vertical header or casing, supported in the smoke box adjacent to the front and the side thereof, and comprising separate saturated and superheated steam compartments, a plurality of loops or bends of superheater pipes, crmnected, at their opposite ends, to the saturated and the superheated steam compartments, respectively, and extending rearwardly therefrom, a steam supply connection opening into the saturated steam compartment, and a steam delivery cornicetion leading out-of the superheated steam compartment.

2. The combination, with a steam boiler, of a vertical header or casing, supported in the smoke box adjacent to the front and the side thereof, and having its outer Wall curved in general accordance with the wall of the smoke box, sald header comprismg separate saturated and superl'ieatcd steam compartments, a plurality of loops or bends of superheater pipes, connected, at their opposite ends, to the saturated and the superheated steam comj'iartments, respectively, and extending rearwardly therefrom, a steam supply connection opening into the saturated steam compartment, and a steam delivery connection leading?r out of the superheated steam compartment.

The combination, with a of a vertical header or casing, the smoke box adjacent to the front side thereof, and uratcd and nsup(nhmtted steam compartsteam boiler, supported 1n and the ments, a plurality of loops or bends of superheater pipes, each extending in alternate rearward and forward convolutions, and connected, atits opposite ends, to the saturated and thc superheated steam compartmcn ts, respectively, a steam supp y connection opening; into the saturated steam` compartment, and a steam delivery connection leading out of the superheatcd steam compartment.

4. 'lhe combination, with a steam boiler,

comprising separate sat-v l i i l of a vertical header or casing, supported in the smoke box adjacent to the front and the side thereof, and comprising; separate saturated and superheated steam compartments, a plurality of loops or bends of superheater pipes, connected, at their opposite ends, to the saturated and the superheated steam compartments, respectively, and extending rearwardly therefrom, a steam supply connection opening into the saturated steam compartment, a steam delivery connection leading out of the super-heated steam compartment, and a vertical partition plate extending longitudinally in the smoke box, on the inne-r side of the set of superheater pipes.

5. The combination, with a steam boiler, of a T head, branch steam supply pipes extending forwardly therefrom, a pair of vertical headers or casings, each supported in the smoke box adjacent to thereof and comprising a saturated steam compartment connected to one of the branch steam supply pipes and a separate superheatcd steam compartment, a plurality of loops or bends of superheater pipes, each connected, at its opposite ends, rated and superheated steam compartments, respectively, of one of the headers, and eX- tending rearwardly therefrom, and branch steam delivery pipes each connected to the superheated steam compartment of one of the headers.

6.- The combination,'with a steam boiler, of two vertical headers or casings, each supported in the smoke box adjacent to the front and one side thereof, and comprising separate saturated and superheated steam compartments, a plurality of loops or bends cf superheater pipes, each connected, at its opposite ends, to the saturated and the superheated steam coY partment, respectively, of one of the heauerf and extending` rearwardly therefrom, steam supply connections opening into the saturated steam compartments, steam delivery connections leading,` out of the supcrheatcd steam compartments, a deflectine' plate or diaphragm eX- tending transversely in the smoke box forward of the front flue sheet, a foraminous sheet or plate extending transversely forward of the deflccting` plate and between the superhcater pipes, and vertical partition plates extending forwardly from the deflecting plate and connected to the foraminous sheet or plate.

7. The combination, with asteain boiler, of two vertical headers or casings, each supported in the smoke boxV adjacent lto the front and one side thereof and comprising separate saturated and :iperheated steam compartments, a passage connecting thc saturated steam compartments of the two headers, a passage connecting-the supcrhcated steam compartments bf the two headers, a

to the satuplurality of loops or bends ofs plpes, eacl to the saturated and the s Compartment, res

Ff headers, a

1 connected, at

nd extending 1' from, :L steam supply conne the saturated. st

uperheater l earwardly 'therectbn leading into earn compartment of one of f the headers, .anda steam dell' tion leading very connecf out of the superheated steam compartment of the other header.

Witnesses:

'HENRY W.'BUTLER, WM. S. FRAME.

HENRY B. OATLEY. 

